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@Winn tangstwi @fficeV Letters Patent No. 76,130, me Mar-@h s1', 186s.

IMPEOVED ENGIE-LATHE POB. TURNING SHAFTING.

dige Stimuli referat tu in; that gains ntnit mit mating putt nf tige sans.

KNOW ALL MEN B Y THESE PRESENTS:

rifhat I, ATHEN WO0D, of the city and county of` Worcester, and Ootnmonweaith of Massachusetts, have invented certain new and useful mprovements in Engine-Lathe's'for Turning Shafting; and I do hereby declare that the following isha full, clear, and exact description ofthe saine, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure .1 representsl a front View of'sio inuch of an engine-lathe as is necessary to illustrate .my present' improvements. i

Figure 2 represente a section on line A B, iig. 1. Figure 3 represents a section on line C D, iig-1'; and f Figure 4 represents a section4 on line E F, same figure.

. `To enable those skilled in the art to which my invention belongs to maite and use the same, will proceed -to describe it/.more in detail.

In the drawings, the part marked A represents the bed of -an ordinary turning-lathe, having'ahead-pi'ece, B, and tail-piece, O. VUpon the ways a a of the bed A, is fitted to move, a common slide-rest, D. This rest is provided, in this instance, with a deve tniled'tongue piece, b, to tit into the auxiliary rest, Fewhich is fitted to more thereon attright angles to the ways a a. In the centre :of the auxiliary rest E is fitted a gauge-ring, c, through which the shaft F'passes, as indicated'in the drawings. The backsof the auxiliary rest E is recessed or cnt out, and a. block, E', fitted to work in saidrecess, and which block can be moved back vand forth by means of the screw or bolt d, which passes loosely through said block, thehead of said bolt or screw bearing against the outside of said block, while a collar, e, is fastened vto the bolt, so as to bear against the inside of the block. The screw part, f, of ther'bolt d, works in the auxiliary rest E. By turning bolt or screw d, block E can be adjusted in er out, t0 drawer move thetool-stands GlG, which arehinged upon opposite sides of said block, so as to cause thcir'cuttng-tools, g h, to approach or recede fromshaft The auxiliary rest E is fastened tol the sliding rest D by means offthe screws l 1. The front side ot' the auxiliary restE is recessed out, and fitted with a slidingvbloek, H, and is provided with an adjusting-screw or bolt, d', having acollar, c', and a screw p'ai-t, f', whereby it can be operated inthe same manner as the sliding block E', to move the tool-rest H', hinged thereto, so asj-to cause its tool, j, to approach or recede from shaft F. The end of the tool-rest H bears upon a. spiral spring, 2, inl the 'cup 3, upon the side of auitiiiary rest E, and is forcedup by the springrf?, :igainst the' point of the adjusting-screw 4;, which passes through a projection on tho rest An adjustingscrew, m, passes throughthe end of theitooi-rcst G, and a similar screw, u, through the tool-,rest G', the points of said screws bearing upon the projecting part, I, of the rest E. The cutting-tools g' hj are held in place by `screws 5, 6, -and "l,

The operation is as follows: The operator runs rest Dwhic h is to be operated in any of the well-kown modes, by screw, rack., or otherwise, back. l,to the tail-piece- The blankbar .for the shaft is then placed in proper position, and lone of the-cutting-toolis, or j, adjustt'zdtp` rou`g-h-trn the shaft, while the other tool turns the shaft to a good fit .in the gauge-ring c, which aifords the desired support to the shaft while' it i's being turned to a gauge or calipered size by the finishing-.tool t.

It willbe observed that each tool has a double adjustment, so that the cutting-tools can be used until their points have worn up short, and .still be made-to work properly. When considerableadjustment is required, as when di'erent shafts are to be turned, or the tools become miich worn-oi?, recourse may be had to the screws d cl; but when'onlysligh't and inconsiderable adjustments 'are requisite, these are obtained by means of the screws m 'n and 4.

It will be `noticed that byvmy mode of hinging and adjusting the tool-rests 'GG' and 1 1, the adjustment can bem-ade verypcrfectlrwhile there. is `no danger of bach piay of the adjusting-devices. As no change orf loosening of the toolsl in their slotted supports, J, K, andfL, upon' theirrespective'rests, takes place when an adjustment is made, shafting can be turned' with far greater accuracy thanby the modes in common use, in which the tool itself Yi'smoyfed to obtain the desired adjustments.

It will be understood' that -two tools may be arranged vupim the finishing-side of the rest E, if preferred.

The parte Gr G and -H lcould be hinged-direct to the rest E, if preferred in any case. By simply turning-back i` stantially as and for the purposes set forth.

the screws 1 l, the auxiliary rest E11-ay be slipped from the rest D, and the eommon tool-support substitutedl in its place in e, very short time, thns vtibing the machine for common work.

The present mode of putting up and running shafting renders it neeessarythap very great accuracy should be observed in its maiiufaeture,jso that: any part of ib may be used for a bearing-surface, and in view of which fact, those skille in the art will appreciate my presenb improvements, whichvrequire but comparatively a small outlay to fit a. common'enginelathe for turning shafcing with as much precision asexpensive engine-lathes fitted expresiy for the purpose. i i Having described my improvements in engine-lathes for-.turning shating, what I claim therein as new and of mynveritio11,anc l desire to secure by Letters Patent, is-n 1. The combination, with the auxiliary resi: E, ofthe slde-pieces E H, and hinged adjustable toolqests or supports, G G and H', Substantially as anllfor the purposesrseb` forth.

2. The combination, with the auxiliary rest E, of the hinged adjustable rest H', eup 3, and spring 2, subm AUBIN WOOD.

Witnesses;

T1105. H. Denen, D.'L. MILLER. 

